[SOLVED]AADSTS220501 InvalidCrlDownload - Azure Entra Certificate Based Authentication (CBA) issue If you like to muck around with Azure & Entra Certificate Based Authentication (CBA), you'll be familiar with the importance of a Certificate Revocation List (CRL). Someday, while trying to login to admin.microsoft.com with a certificate, I experienced this AADSTS220501 Error so I started troubleshooting at it. What's interesting is that the CRL was online,… Read More